Benjamin Curtis stympy

Using Unicorn with Upstart

This configuration works with Upstart on Ubuntu 12.04 LTS

The reason why it needs to be done this way (i.e. with the pre-start and post-stop stanzas), is because Upstart is unable to track whever Unicorn master process re-execs itself on hot deploys. One can use it without hot-deploys and run Unicorn in foreground also, it then only needs one exec stanza.

This presumes you are not using RVM, so no voodoo dances.

How to setup a practically free CDN using Backblaze B2 and Cloudflare

⚠️ Note 2023-01-21
Some things have changed since I originally wrote this in 2016. I have updated a few minor details, and the advice is still broadly the same, but there are some new Cloudflare features you can (and should) take advantage of. In particular, pay attention to Trevor Stevens' comment here from 22 January 2022, and Matt Stenson's useful caching advice. In addition, Backblaze, with whom Cloudflare are a Bandwidth Alliance partner, have published their own guide detailing how to use Cloudflare's Web Workers to cache content from B2 private buckets. That is worth reading,

Rails => Lambda

These are my notes from deploying a boilerplate Rails app to AWS Lambda (yeah, you read that right) using Lamby. Basically this is me going through the Quick Start guide.

Questions/comments: https://twitter.com/heyjoshwood

	class ApplicationController < ActionController::Base
	before_filter :ensure_xhr

	private
	def ensure_xhr
	if request.get? && request.format && (request.format.js? \|\| request.format.json?)
	head :forbidden unless request.xhr?
	end
	end
	end

	# Idempotent way to build a /etc/hosts file with Ansible using your Ansible hosts inventory for a source.
	# Will include all hosts the playbook is run on.
	# Inspired from http://xmeblog.blogspot.com/2013/06/ansible-dynamicaly-update-etchosts.html

	- name: "Build hosts file"
	lineinfile: dest=/etc/hosts regexp='.*{{ item }}$' line="{{ hostvars[item].ansible_default_ipv4.address }} {{item}}" state=present
	when: hostvars[item].ansible_default_ipv4.address is defined
	with_items: groups['all']

	function password_encode(password)
	local bcrypt = require 'bcrypt'
	return bcrypt.digest(password, 12)
	end

	function check_password(password, encoded_password)
	local bcrypt = require 'bcrypt'
	return bcrypt.verify(password, encoded_password)
	end

	#!/usr/bin/env ruby

	require 'time'
	require 'logger'
	require 'aws-sdk'

	AWS_REGION = "us-east-1"
	AWS_KEY_ID = ""
	AWS_SECRET_KEY = ""

	{
	"AWSEBDockerrunVersion": "1",
	"Image": {
	"Name": "<AWS_ACCOUNT_ID>.dkr.ecr.us-east-1.amazonaws.com/<NAME>:<TAG>",
	"Update": "true"
	},
	"Ports": [
	{
	"ContainerPort": "443"
	}

	# Add this snippet to the top of your playbook.
	# It will install python2 if missing (but checks first so no expensive repeated apt updates)
	# [email protected]

	- hosts: all
	gather_facts: False

	tasks:
	- name: install python 2
	raw: test -e /usr/bin/python \|\| (apt -y update && apt install -y python-minimal)

	class Counter
	include Sidekiq::Worker

	# I'd use a separate Redis instance from Sidekiq
	REDIS = ConnectionPool.new(size: 5) { Redis.new(...) }

	# Call this API in your Rails app code to increment counters
	# as the user does things.
	def self.incr(name, amount=1)
	key = "counter-#{name}-#{current_window}"